Valve.



F. W. HODGES.

VALVE.

APPLICATION FILED SEPT. I I. I912.

Patented Nov. 30, 191 5.

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' FREDERICK W. HODGES, OF DETROIT, MICHIGAN, ASSIGNOR TO DETROIT LUBRICATOR COMPANY, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

VALVE.

' Specification of Letters Patent. PatgntedNov, 30, 1915.

Application filed September ll, 1912. Serial No. 719,748.

To all whom it may concern:

Be it known that I, Fnnnnnion W. Honors, a citizen of the United States of America, residing at Detroit, inthe county of Wayne and State of Michigan, have invented certain new and useful Improvements in Valves, of

which the following is a specification, ref erence being had therem to the accompanymg drawings.

The invention relates to valves more particularly designed for use in connection with vacuum steam heating systems and for simi lar purposes where the port opening of the valve is varied in accordance with its location in the system.

nal section through the valve; Fig. 2 isa;

, plan view thereof; and Fig. 3 is a section on line a2w.

A is the valve casing; B is the cap therefor, through which the valve stem C projects; D is an operating handle engaging the valve stem; E an indicator disk; and F a stop pin on the valve handleengaging a segmental slot G in said disk to limit the normal turning of the stem. The valveH as shown is of the hollow plug type, and is provided with a port I adapted to register with a port J in the case A. These ports when in registration open a passage from the main body of the case into a laterally extending nipple K to which the supply pipe is connected.

W hen a valve, such as described, is used in a vacuum steam heating system it is desirable to vary the port opening according to the position of the valve in the system. It 7 is also desirable to effect this adjustment without disconnecting the valve from the system. This I have accomplished by an adjustable engagement between the plug and its operating stem permitting the former to be moved longitudinally within the central valve case. I have further provided a means for effecting this adjustment without detaching the cap B of the case, and one which enables the operator to determine exactly thedegree to which the ports are restricted. y

In detail, the valve stem Q is of a, polygm nal cross section, and engages a correspondingly formed aperture in the plug H so as to rotate with the latter while permitting independentlongitudinal movement. The plug H has a head portionL, which is provided with a fine screw thread engaging a corresponding longitudinal screw thread in the cap member 13.. This threadedengagement will cause a relative longitudinal adjustment of the stem and plug during the rotation thereof, but the limited angular adjustment of the stem inopening and closing the port will cause but very slight longitudinal displacement of the plug. Whenever it is desired to change the port opening of the valve the stop pin F is removed from its engagement with the segmental slot G which permits the continuousrotation of the handleD in either direction. Thusthe,

operator is permitted to screw the plug upward or downward inthe threaded cap B,

and, sutficient range of adjustment is provided to vary the port opening from full opening to complete closure.

'The plug H is preferably slitted longitudinally and has, suflicient resiliency to ad just itself automatically to its cylindrical seat. The stem is packed to prevent leak age, preferably by forming a collar M thereon which bears against a packing ring N, and the latter against a shoulder O on the cap. The end of the stemC has a threaded portion P which engages a nut Q.

R is a spring between the nut Q, and a cup-shaped bearing S in the handle D, the arrangement being such that the stem is resiliently drawn outward to maintain a pressure of the collar M upon the packing N.

In the adjustment of the valve the. operator, knowing the number of threads to the inch, can efiect any desired adjustment by a suitable number of turns of the handle, after which the stop pin F is replaced in engagement with the slots G, which will limit the angular movement of the stem.

It will be obvious that by having a stem for the valve which does not shift its position sidewise, that is a non-lifting stem,the

packing for the stem is not affected by the adjustment of the valve to change its port openlng. What I claim as my invention is:

l. The combination with a valve case, of

a plug valve in said case, a stem for rotating said valve, a handle engaging the stem for operating the valve, an adjustable-stop member carried by the handle, an indica tor disk mounted upon the case and formed with shoulders in the path of rotation of the stop member, normally limiting the angularmotion of'the handle, and means oper-v able upon an adjustment of the stop member out of the path of said shoulders, :and.

upon subsequent rotation of the handle, for adJll'stmg the valve with respect to the stem opening of the valve.

'2. The combination'witha valve ease of and valve case to variably restrict the port a ary Y iI I C% liello pl sr seated within said case, a recessed cap for said case, long tudinally threaded to engage a hr ad d e fi t ai P u a t m h ns ro ygo ia Por i n ing a C r sponding aperture in the end of said Pl g,

said cupped portion and alnllt on the end of said stern I forming a bearing for said r mef 3. The combination with a valve casing,

a revoluble valve'and a valve stem, the stem and easing be ng formed with coacting Copies of this'patent may he obtained for five cents each, by Washington, ,1). 0.

tween said shoulders, a handle member enag ng pelygonal portion of the stem exterlor to the casing, a nut engaging sald stud, and a spring compressed between the handle member and send nut, retaining the handle member 1n engagement truth the polygonal portion of the stem and maintaining the packing pressed between said coacting shoulders. I

4t. The combination with a cylindrical valve member formed at one extremity with an exteriorly threaded head of a diameter greater than that of the" valve proper, of a casing having a ported portion with which the valve pnoper has sliding engagement and having a threaded portion engaged by the valve head, and means for rotating the valve to open and close the same and to vary its maximum portage, the threaded portion of the casing receiving both the valve head and a portion of the valve proper in the position of rnaximu n portage of the valve.

In testimony whereof I affix my signature in presence of two witnesses. FREDERICK W. HGDGES. ,Witnesses' t v BE KNAP, JAMES P. v13.412mr.

addressing the Commissioner of Patents. 

